Home / 214,140.40-321,064.80-81,000.70

Finding the Fourth Proportional to 214,140.40, 321,064.80 and 81,000.70

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Solution

The fourth proportional to 214,140.40, 321,064.80 and 81,000.70 is: 121,445.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,140.40 : 321,064.80 = 81,000.70 : x
  2. Step 2: Convert to fraction form
    214,140.40/321,064.80 = 81,000.70/x
  3. Step 3: Cross multiply
    214,140.40x = 321,064.80 × 81,000.70
  4. Step 4: Simplify right side
    214,140.40x = 26,006,473,545.36
  5. Step 5: Solve for x
    x = 26,006,473,545.36/214,140.40
  6. Step 6: Final answer
    x = 121,445.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.